Carbureter.



,.E. SPRUN G.

GARBURBTBR.

' APPLIOATION FILED MAB.. 24, 1913. 1,073,179. Panenteisept. 16, 1913.

2 SHEETS-SHEET 1.

ge A

,24 if g f 1 43 M 1 i* i r2@ I aww/wko@ -E. SPRUN G; GABBURETER.

' APPLICATION FILED MAR. 24, 1913.

. 1,073,179, Patented Sept. 16, 1913.

z slums-SHEET 2.

.EBMUND SPRUNG, DETROIT, MICHIGAN, ASSIGNR 0F ONE-HALF TQ WILLIAM D.

" HEALY, 0F DETROIT, MICHIGAN.

CARBURETER.

Specification of Letters Patent.

Patent-ed Sept. 16, 19.13.

To all whom. t may concer/n.'

Be it known that I, EDMUND SPRUNG, a citizen of the United States of America, residing at Detroit, in the county of Wayne andStat'e of Michigamjhave invented certain new and useful Improvements in Carbureters, of which the following is a specification, reference'being had -therein to the accompanying drawings. e

This invention relates to improvements in carbureters and its object is to provide a construction in--which vtheffuel vwill be supplied in proportion tothe speed of the engine, a Series of nozzles being so arranged and controlled that as the throttle is opened and the speed of the engine increases the nozzles will be successively uncovered in Vproportion to the movement of the throttle.

It is also an object of the invention to provide va simple `and eiiicient means EforV controlling the air supply, which means are arranged to vbe -automatically operated by the suction of the engine.

A further object` of the invention Ais to provide a simple and compact construction having certain other new and useful features:

of construction and arrangement of parts, all as hereinafter more 'fully described, reference being had to the accompanying dra-wings. V

To these ends the invention consists in the matters hereinafter more fully described and-particularly pointed out in the appended claims.

Referringto' the accompanying drawings, Figure 1 .is a plan view of a device embodying the invention; Fig. 2 a side elevation of the same;-Fig. 3 is avert-ical section onthe line III-III of Fig. 1; Fig. /1 is a transverse vertical section on the line IV-IV of Fig. 1, and Fig..5 is a sectional detail on the line V-V of Fig. 2.

In the drawing, 1 indicates a casing forming a suitable float chamber for a float 2 which is guided in its vertical movement by a stem 3 at its upper end extending upward through a guide bearing in a cover 4 for the chamber. At its lower end the float is guided by means of a stem 5 having a valve member 6 on its lower end to engage a seat in the' bottom of the casing to control the'indow of gasoiene from a suppl-y coupling-7 attached tothe bottom of the casing.

A hollow extension f8 `extends laterally from one side ofthe oat chamber land leading into the bottom of this hollow eX- tension isa dra-wpd cock 9 for drawing ol the contents of the float chamber.

A tubular-member or barrel 10 is seated uponthe upper side of the extension '8 and 60 extends horizontally across the extension.

Bolts 11 securev it inplace thereon 1 and an opening'is provided i'nits lower .side opposite a series of verticalbo'res -12`into which a series of jet-pipes orgnozles 13a-re secured 65 and' extend upwardly A.acrcss vthe barrel. Fuel isadmitted-to then'ozzlesby means ot needle lval'ves 14 controlling' openings lead ing from the interior of the extension 8 into the bottoms otthebores 12. The stems of the needle valves 14 extendk outward through stuffing bones15 and fmaybe engaged at their cater endsaand turned. to accurately -adjustithem toward or from their seats and regulate thesupply of `fuelto each ofthe nozzles.v Thebarrel VlO'is formed with an upwardly ,projecting tubular extension 16 forming an outletpassage directly opposite .the upper ends of the jet nozles 143. This tubular extension is provided-.with alateral so angeifor attaching. the carbnreter to the intake manifold of an internal combustion engine,-and inf'tliis outlet passage 16' is a throt tle valve 17 of the usual construction mounted u on .afftransvfe'rse stemrliS extending outwar ly :thaou'gh one `wall of Ithe passage. Secured uponthe outer end of the stem' is an arm 19 for turning'the valve, this arm being-actuatedin any suitablemanner, not

shown. Fitting within thetubularcasing or barrel 10 isa4 tubular shutter 20 reciprocable within the barrel acrossthe inner end of the discharge? or outlet passage 16. This member 20'is open aft one end and closed at its opposite end, astem or-rod 21 being se- 95 cured to the closed-end of the shutter and extending outward through a beaming in the end of the barrel. .The shutter is provided with. a slot 22. in. its lower side throughwhich' the nozzles :13 extend' and thus the shutter M0 may be moved' longitudinally in the barrel to bring its upper closed side across the dis# charge passage 16 .and overthe upper-ends of the nozzles 13 which ends extend towithin` a very short distance of the upper closed N5 side of the shutter, the shutter is also formed witha notch 23 in one end at its upper side sothat whenY the shutter is moved inward to the'limit 'of its movement the notch, will form a small opening through which the in- H0 terior of the barrel will communicate vvithv the outlet passage and this notch is close to the upper end of the end nozzle of the row pf nozzles.

An arm 24 is securedv to and extends laterally from the outer end of the rod'21 by means of which the shutter is moved and pivotally connected to this arm is a connecting rod or link 25 Which is pivotally attached at its opposite end to the arm 19 'on the stem of the throttle valve 17. It will thus be seen that when the throttle valve is operated by turning the arm 19, the shutter 20 will also be moved, the connection being such that as the throttle valve is opened the shutter will be proportionately'Withdrawn from over the upper ends of the jet nozzles, uncovering one or more of these nozzles aocording to the amount which the throttle is opened and the consequent increase of speed of the engine. A stop screw 43 is carried by the arm 24 to engage the end of the casing 10 and limit the movement of the shutter across the outlet passage.

Means for controlling the admission of air to the open end of the barrel comprises a suitable tubular air inlet casing 26, one end of which is formed to lit within a seat provided therefor in the end of the barrel l0 and adapted to be secured in place there# in by means of a clamping screw 27. At its outer end the casing is formed With an enlarged lateral extension 28 which is 'rovided with a cap 29 having an axial air inet o ening and formed with a spider 30 exten ing across the opening to provide a. bearing for an adjustable valve stem or guide rod -31 Having screw-threaded engagement WithF the bearing and locked in position in which it is adjusted by means of a Winged nut 32. Sleeved upon the stem 31 to slide freely thereon and cover the inlet opening in the cap 29, is a'disk valve 33 and to normally hold this valve to its seat over the a'ir inlet opening, 'a coiled spring 34 ,is sleeved upon thestem between the valve and a head 35 on the lower end of the stem. This spring 3l.l

valve When the spring 34: has yielded and permitted the valve to open a short distance against-the resistance-of said spring 34. only. The air inlet casing is also formed with a lateral extension 37 directly opposite the extension 28. This extension forms the does' Lorenza main air inlet for the carbureter and its outer end is formed so that a pipe or other conductorijnot shown) maybe attached theretotocondnct heated air from any convenient source to the earbureter.

lWithin the main inlet 37 is a valve 3 adapted tobe turned by means of an arm 39 on the outer end of its shaft to close the main air-passage..f4 A second arm 40 is sc cured to the shaftof the valve 38 and extends laterally in such position that when the 'valve isfturned said arm will be swung into enga-gement. with the lower end of a push rod 41 which is mounted in a suitable bearing or opening in the casing and extends upward therethrough with its upper end directly belen'r thel valve 33. When the valve 38 is turned by the rod 42 or other suitable' means, ix) close thek main air inlet and thus choke the carbureter for starting purposes, the arm 40 will lift the push rod 41 into engagement with the valve 33 and hold said valve closed so that it will not be opened by the suction of' the engine. The full -force of the suction will therefore be exerted to draW fuel through the jet nozzles and avery strong charge Will thus be supplied or priming the engine. v

A?nthis construction the inrushing air is ldirected upward around and over theV upper endl of the nozzle or nozzles `Which'are unf The particular arrangement of the air in let control gives an accurate automatic regulation of air supply which may be entirely cut 0H for starting the engine if so desired. Having thus fully described my invention, what I claim is 'covered by the shutterI and'thus the mixture l. In a carburetor the combination of a horizontally disposed tubular casing open at one end and having ya discharge passage leading laterally'therefrom intermediate its ends, a series of'jet nozzles arranged .in a vrovv longitudinally; Ainig the tubular `casing eXIldin across' the same With their drschargeen sopposite' the discharge passage, -a, tubular shutter fitting Within the casing 'to slide therein -and provided with an open end and a slot in one side to receive the nozzles, the' opposite side of the shutter Y being closed to extend over the discharge ends of the nozzles and across the outlet passage of the casing, a rod having a bearing in the' end of the casing and secured to the closed endl of' the shuttr, a throttle valve in the outlet passage of the casing, an arm 2. In a carbureter, the combination of a casing forming a iloat chamber and having a hollow lateral extension formed with a series of vertical bores opening through the upper side thereof, a tubular casing secured upon said extension in horizontal position and formed withan outlet passage at one side and a slot in its lower side, said. casing being open at one end and closed at its opposite end, a series of jet nozzles secured in the bores of the lateral extension of the` Hoat chamber casing and extending upward through the opening in the bottom of the tubular casing with their discharge ends adjacent to the upper side of the casing and opposite the outlet passage, a tubular shutter slidable within the t-ubular casing and formed with an open end and a slot in one side to receive the row of nozzles, the `opposite side of said shutter being closed and provided with a notch in the o en end of the shutter, said closed side of t e shutter being adapted to project across the outlet passage of the casing over the open discharge ends of the nozzles when the shutterv is moved in the casing, a rod secured to the closed end of the shutter and having a bearing in the ends ofthe casing, a throttle valve turnable within the outlet passage, an arm for operating the throttle valve, a rod con- 'necting said arm and the outer end of the rod which is secured to the shutter, and a tubular air inlet casing forming an extension of the tubular casing, and provided with a main and an auxiliary air inlet.

'3. In a carbureter, thev combination of a tubular casing open at one end and closed at its opposite end, formed with an ou'tlet l passage intermediate its ends, a series of y jet nozzles extending across the casing and arranged in a longitudinal row with their discharge ends opposite the outlet passage of the casing, a shutter slidable longitudinally within the tubular casing across the4 outlet passage and over the ends of the'vnozzles, means for moving the shutter, an air inlet casing forming a continuation of the tubular casing and detachably attached thereto, said casing being formed with a main air inlet at one side and an auxiliary air inletv at its opposite side, a valve to control the auxiliary air inlet adapted to'be opened by suction through the carbureter and a spring within the casing for yieldingly holding the valve closed.

4. In a carbureter, the combination of a casing having an outlet passage and opened at one end, means for supplying fuel to thev interior of said casing, an air inlet casing detachably secured to the open end of said casing andformed with a main air inlet opening at one side and an auxiliary air inlet opening at the opposite side, a valve and means for actuating one of the valves to closed position and holding the other of said valves in closed position.

5. In a carbureter, the combination of a main casing having an open end and a lateral discharge passage, means for supplying fuel to said casing, a tubular air inlet casing forming a continuation of the main casing and `adjustably secured thereto, said air inlet casing being formed with a main air inlet opening-at one side and an auxiliary air inlet opening at the opposite side, a valve for closing the auxiliary opening, a spring to normally hold said valve closed, a valve to close the main air inlet opening, means for operating said valve in the main air inlet opening, and means operated by the 'actuation of said valve for holding the valve controlling the auxiliary air inlet in closed position.

In testimony whereof I ailix my signature in presence of two witnesses.

EDMU YD- SPRUNG.

Vitnesses vC. R. STICKNEY,

O'i'ro F. BAn'ii-inr..

Copies of this patent may be obtained `for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

-for closing each of the air inlet openings I I 

